Oh, this is a good one to bring up. I think I'm let down EVERY time I give a car over to a garage.
The last time was my old 3rd gen. Firebird (now sold). I wanted the plugs and leads changed. I'd already done the rotor arm and cap but I had no tools for getting the parts off to access the plugs. I knew the reason why the car wouldn't start was because of the plugs but Mr Smarmy knew better and thought it needed alot more work to make it run again. I said "Just change the plugs and leads first and we'll see".
I also ask for the oil and filter to be changed along with the exhaust/manifold joint either tightening up or gaskets replacing.
When I came to collect the car I paid around £250 and the exhaust hadn't been touched !!
I said to the guy, what about the list you wrote down of the things I wanted doing ? He lost it - how convenient. I got tucked right up by a proper cowboy claiming to be an American car specialist. The car did start and ran beautifully except for the exhaust blow.
I also took an old VW to a "specialist" VW mechanic who was just starting out for himself down near Crawley. I refer to him as John Wayne now. Nice guy, friendly enough but not completely competant. How does somebody have pictures of so many modified cars on his wall, all his own work and yet is unable to change a power-steering belt ? Charged me for about 6 hours of his time because he struggled to fit new exhaust manifold gaskets. Wish I'd done it myself in the end.
The stupid sod also ballsed up my PAS because he tightened the belt too tight. The PAS wouldn't operate at all unless the car was revved to over 2.5k rpm. I then took the car to Greenwich and a power steering specialists (and these guys are proper specialists) and he just loosened it off. Worked right away. Only the spindle was damaged and it made a horrible whurring noise now. Didn't charge me either but I did go and buy a big bag of cakes for the lads down there.
Those are only 2 instances. The only place I have mostly been happy to take a VW is to The Phirm. If they had a decent waiting area and a coffee machine they'd be perfect.